USB

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

Note: This feature is available in Web Workers.

The USB interface of the WebUSB API provides attributes and methods for finding and connecting USB devices from a web page.

Use navigator.usb to get access to the USB object.

The USB interface inherits from EventTarget.

EventTarget USB

Instance properties

None.

Instance methods

USB.getDevices() Experimental

Returns a Promise that resolves with an array of USBDevice objects for paired attached devices.

USB.requestDevice() Experimental

Returns a Promise that resolves with an instance of USBDevice if the specified device is found. Calling this function triggers the user agent's pairing flow.

Events

connect Experimental

Fired whenever a previously paired device is connected.

disconnect Experimental

Fired whenever a paired device is disconnected.

Specifications

Specification
WebUSB API
# usb

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
USB
Experimental
connect event
Experimental
disconnect event
Experimental
getDevices
Experimental
requestDevice
Experimental
Available in workers
Experimental

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support
Partial support
Partial support
No support
No support
Experimental. Expect behavior to change in the future.
See implementation notes.
Has more compatibility info.